# US 2024/0201150 A1 · System and method for determining gas-water ratio in a reservoir fluid > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0201150 A1 - Document ID: US20240201150A1 - Status: Published application - Kind: A1 - Application number: 18/066,479 - Filed: 2022-12-15 - Published: 2024-06-20 - Earliest claimed: 2022-12-15 - Assignees: Saudi Arabian Oil Company - Applicants: Saudi Arabian Oil Company - Inventors: Ahmed M. SAHL; Abdullah F. ALMOUSA; Mohammed H. BASHRAWI; Daryl S. SEQUEIRA - Web page: https://patentgrep.com/patent/US20240201150A1 ## CPC - G01N 33/2841: {Gas in oils, e.g. hydrogen in insulating oils} - G01N 30/86: Signal analysis - G01N 33/2847: {Water in oils} - G01N 30/20: using a sampling valve - G01N 30/30: of temperature - G01N 30/32: of pressure or speed (G01N30/36 takes precedence) - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) ## Abstract A gas-water flash separator system includes an inlet water line fluidly communicable with a sample cylinder containing a pressurized reservoir fluid, and a glass trap sealable with a manifold and in fluid communication with the inlet water line to receive the pressurized reservoir fluid, the pressurized reservoir fluid being separable within the glass trap at atmospheric conditions into a flashed gas and a reservoir water. A gasometer is in fluid communication with the glass trap via a gasometer flow line and operable to receive the flashed gas and measure a volume, a temperature, and a pressure of the flashed gas. A weight and a density of the reservoir water is measured and compared against the volume of the flashed gas to thereby determine a gas-water ratio of the pressurized reservoir fluid. ## Claims ### Claim 1 A system, comprising: an inlet water line fluidly communicable with a sample cylinder containing a pressurized reservoir fluid; a glass trap sealable with a manifold and in fluid communication with the inlet water line to receive the pressurized reservoir fluid, the pressurized reservoir fluid being separable within the glass trap at atmospheric conditions into a flashed gas and a reservoir water; and a gasometer in fluid communication with the glass trap via a gasometer flow line and operable to receive the flashed gas and measure a volume, a temperature, and a pressure of the flashed gas, wherein a weight and a density of the reservoir water is measured and compared against the volume of the flashed gas to thereby determine a gas-water ratio of the pressurized reservoir fluid. ### Claim 2 (depends on 1) The system of claim 1, wherein the glass trap and the gasometer are arranged on a base and the base includes a plurality of wheels that provides mobility to the system. ### Claim 3 (depends on 1) The system of claim 1, further comprising: a flashed gas cylinder arranged in the gasometer flow line; a first valve arranged at a first fluid end of the flashed gas cylinder; a second valve arranged at a second fluid end of the flashed gas cylinder, wherein closing the first and second valves captures a sample of the flashed gas within the flashed gas cylinder; and a gas chromatograph instrument fluidly communicable with the flashed gas cylinder to determine a composition of the sample of the flashed gas. ### Claim 4 (depends on 3) The system of claim 3, wherein the flashed gas cylinder is removable from the gasometer flow line to place the flashed gas cylinder in fluid communication with the gas chromatograph instrument. ### Claim 5 (depends on 3) The system of claim 3, wherein the flashed gas cylinder comprises a first flashed gas cylinder and the sample of the flashed gas comprises a first sample of the flashed gas, the system further comprising: a second flashed gas cylinder in fluid communication with the gasometer flow line downstream from the first flashed gas cylinder; a third valve interposing the gasometer flow line and the second flashed gas cylinder, wherein closing the third valve captures a second sample of the flashed gas within the second flashed gas cylinder, and wherein the gas chromatograph instrument is fluidly communicable with the second flashed gas cylinder to determine a composition of the second sample of the flashed gas. ### Claim 6 (depends on 1) The system of claim 1, further comprising at least one high-pressure valve arranged in the inlet water line and interposing the sample cylinder and the glass trap, the at least one high-pressure valve being operable to regulate a pressure of the pressurized reservoir fluid conveyed to the glass trap. ### Claim 7 (depends on 1) The system of claim 1, further comprising a vacuum valve arranged in the gasometer flow line and operable to create a vacuum in the gasometer flow line that draws the flashed gas from the glass trap and into the gasometer flow line. ### Claim 8 (depends on 7) The system of claim 7, further comprising a vacuum pressure gauge for monitoring a pressure within the gasometer flow line. ### Claim 9 (depends on 1) The system of claim 1, further comprising a helium valve in fluid communication with the gasometer flow line and operable to inject helium into the gasometer flow line. ### Claim 10 A system comprising: a base including a plurality of wheels; an enclosed flash separator assembly positioned on the base and including: an inlet water line fluidly communicable with a sample cylinder containing a pressurized reservoir fluid; a glass trap sealable with a manifold and in fluid communication with the inlet water line to receive the pressurized reservoir fluid, the pressurized reservoir fluid being separable within the glass trap at atmospheric conditions into a flashed gas and a reservoir water; and a gasometer positioned on the base and in fluid communication with the glass trap via a gasometer flow line, the gasometer being operable to receive the flashed gas and measure a volume, a temperature, and a pressure of the flashed gas, wherein a weight and a density of the reservoir water is measured and compared against the volume of the flashed gas to thereby determine a gas-water ratio of the pressurized reservoir fluid. ### Claim 11 (depends on 10) The system of claim 10, further comprising: a flashed gas cylinder arranged in the gasometer flow line; a first valve arranged at a first fluid end of the flashed gas cylinder; a second valve arranged at a second fluid end of the flashed gas cylinder, wherein closing the first and second valves captures a sample of the flashed gas within the flashed gas cylinder; and a gas chromatograph instrument fluidly communicable with the flashed gas cylinder to determine a composition of the sample of the flashed gas. ### Claim 12 (depends on 11) The system of claim 11, wherein the flashed gas cylinder comprises a first flashed gas cylinder and the sample of the flashed gas comprises a first sample of the flashed gas, the system further comprising: a second flashed gas cylinder in fluid communication with the gasometer flow line downstream from the first flashed gas cylinder; a third valve interposing the gasometer flow line and the second flashed gas cylinder, wherein closing the third valve captures a second sample of the flashed gas within the second flashed gas cylinder, and wherein the gas chromatograph instrument is fluidly communicable with the second flashed gas cylinder to determine a composition of the second sample of the flashed gas. ### Claim 13 (depends on 10) The system of claim 10, wherein the enclosed flash separator assembly further includes a hydrogen sulfide detector. ### Claim 14 (depends on 10) The system of claim 10, further comprising a vacuum valve arranged in the gasometer flow line and operable to create a vacuum in the gasometer flow line that draws the flashed gas from the glass trap and into the gasometer flow line. ### Claim 15 (depends on 10) The system of claim 10, further comprising at least one high-pressure valve arranged in the inlet water line and interposing the sample cylinder and the enclosed flash separator assembly, the at least one high-pressure valve being operable to regulate a pressure of the pressurized reservoir fluid conveyed to the glass trap. ### Claim 16 A method comprising: fluidly coupling a sample cylinder containing a pressurized reservoir fluid to an inlet water line; receiving the pressurized reservoir fluid in the inlet water line, and conveying the pressurized reservoir fluid to a glass trap sealed with a manifold; separating the pressurized reservoir fluid in the glass trap at atmospheric conditions into a flashed gas and a reservoir water; receiving the flashed gas in a gasometer flow line in fluid communication with the glass trap via a gasometer flow line; measuring a volume, a temperature, and a pressure of the flashed gas with the gasometer; measuring a weight and a density of the reservoir water; and comparing the weight and the density against the volume of the flashed gas and thereby determining a gas-water ratio of the pressurized reservoir fluid. ### Claim 17 (depends on 16) The method of claim 16, further comprising: receiving a sample of the flashed gas within a flashed gas cylinder arranged in the gasometer flow line; closing first and second valves arranged at opposing first and second fluid ends, receptively, of the flashed gas cylinder and thereby capturing the sample of the flashed gas within the flashed gas cylinder; placing the flashed gas cylinder in fluid communication with a gas chromatograph instrument; and determining a composition of the sample of the flashed gas with the gas chromatograph instrument. ### Claim 18 (depends on 17) The method of claim 17, wherein determining the composition of the sample of the flashed gas comprises measuring for at least one of Nitrogen, Carbon Dioxide, Hydrogen Sulfide, Methane, Ethane, Propane, i-Butane, n-Butane, i-Pentane, Hexanes, Heptanes, Octanes, Nonanes, Decanes. ### Claim 19 (depends on 16) The method of claim 16, wherein receiving the pressurized reservoir fluid in the inlet water line comprises regulating a pressure of the pressurized reservoir fluid conveyed to the glass trap using at least one high-pressure valve arranged in the inlet water line and interposing the sample cylinder and the glass trap. ### Claim 20 (depends on 16) The method of claim 16, wherein at least the glass trap and the gasometer are mounted to a base including a plurality of wheels.